On Fri, Feb 07, 2014 at 09:18:27AM +0800, Shaohua Li wrote: > Reusing the tag for flush request is considered before. The problem is driver > need get a request from a tag, reusing tag breaks this. The possible solution > is we provide a blk_mq_tag_to_request, and force driver uses it. And in this > function, if tag equals to flush_rq tag, we return flush_request.
If we want to support tag to request reverse mapping we defintively need to do this in the core, at which point special casing flush_rq there is easy. Which driver needs the reverse mapping? Neither virtio_blk nor null_blk seem to and I've not seen any other conversions submitted except for the scsi work. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
